Arnaut and Karkur's Prosody Resource - A revised edition of this high-brow prosody guide. The phonetic aspects of English poetry seen through a comparison with other Western European languages.
Free Verse - A definition and description of the term "free verse."
Interactive Quiz on Meter - "Test your grasp of terms and your ability to identify [poetic] meters by name."
It's What I Do - Poetry, different styles of writing, art work.
Let's Learn About Poetry - A good though not extensive informal treatise on various forms and types of poetry.
Marc Moskowitz's Latin Poetry Page - "This page is meant to be a jumping-off point for examples of modern (aka 20th century) Latin verse as well as information about such things as scansion, poetic style, and anything else that seems related."
The Ode - A brief description and definition of the Ode form.
Poetry: Meter, Form, and Rhythm - This site provides interactive tutorials in poetic forms and meter, links to other poetry sites, and numerous examples of stanzas and fixed poetic forms.
ProsePoetry - Brief explanation of prose poetry with examples and additional links.
Prosody Anecdotes - Alberto Rios of Arizona State University has posted anecdotes and introductions to some of the canonical forms of European poetry.
Spectra - Satiric poetic 'school' founded by Witter Bynner and Arthur Davison Ficke.
Sprung Rhythm in Hopkins - A brief description of Gerard Manley Hopkin's use and interpretation of the term.